A J Fleming et al 2003 Smart Mater. Struct. 12 57 doi:10.1088/0964-1726/12/1/307
A J Fleming1, S Behrens and S O R Moheimani
Show affiliationsStructural vibration can be reduced by shunting an attached piezoelectric transducer (PZT) with an electrical impedance. Current shunt circuit designs, e.g. a single-mode inductor–resistor network, typically require large inductance values of up to thousands of henries. In practice, discrete inductors are limited in size to around 1 H. By placing an additional capacitance across the terminals of the PZT, shunt circuit inductances can be drastically reduced. To justify our claims, we present a theoretical analysis of the damped system and identify the influence of the additional capacitance. Two modes of a simply supported beam are successfully damped using a capacitance modified shunt circuit. A low inductance multi-mode circuit is also studied and experimentally verified.
46.40.Ff Resonance, damping and dynamic stability
85.50.-n Dielectric, ferroelectric, and piezoelectric devices
Issue 1 (February 2003)
Received 27 November 2001, in final form 16 August 2002
Published 10 January 2003
A J Fleming et al 2003 Smart Mater. Struct. 12 57
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